/*
 * Copyright (c) 2019, 2019, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
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 */
package com.oracle.svm.configure.trace;

import java.util.Collection;
import java.util.List;
import java.util.Map;

public abstract class AbstractProcessor {
    AbstractProcessor() {
    }

    abstract void processEntry(Map<String, ?> entry);

    void setInLivePhase(@SuppressWarnings("unused") boolean live) {
    }

    static void logWarning(String warning) {
        System.err.println("WARNING: " + warning);
    }

    @SuppressWarnings("unchecked")
    static <T> T singleElement(List<?> list) {
        expectSize(list, 1);
        return (T) list.get(0);
    }

    static void expectSize(Collection<?> collection, int size) {
        if (collection.size() != size) {
            throw new IllegalArgumentException("List must have exactly " + size + " element(s)");
        }
    }
}
